![](https://image.tmdb.org/t/p/original/a4x7GkWN4Nel8RwKwfQaVHOLOjG.jpg)
![](https://image.tmdb.org/t/p/w342/fmlMmxSBgPEunHS5gjokIej048g.jpg)
Venomous
Derek becomes convinced that Lydia is the shapeshifter they're after, forcing Scott to gather his friends -- and even some enemies -- to protect her.
![](https://image.tmdb.org/t/p/w300/swHKfpG1vj4fuBtix8jUc16ao9z.jpg)
![](https://image.tmdb.org/t/p/w300/rKuw94LmTWtCHC9Lm5LeiorGr9d.jpg)
![](https://image.tmdb.org/t/p/w300/2SzN10RYOvpIf44LeRIjlfhrZTg.jpg)
![](https://image.tmdb.org/t/p/w300/p27o9mGdbFTnucggnsM3rk5efiR.jpg)
Other episodes for this season
![Omega](https://image.tmdb.org/t/p/w300/4xTx1Gsmi36tSyJgRj4t6ADO06C.jpg)
![Shape Shifted](https://image.tmdb.org/t/p/w300/pBvxd2xrTEwGZax1Wi3ykRX0DFD.jpg)
![Ice Pick](https://image.tmdb.org/t/p/w300/kBOCQioHaSHLTtmooAg9sE0Rl2L.jpg)
![Abomination](https://image.tmdb.org/t/p/w300/bgSqvrj2neFzTNm2A1Fy2Z0AwWX.jpg)
![Venomous](https://image.tmdb.org/t/p/w300/a4x7GkWN4Nel8RwKwfQaVHOLOjG.jpg)
![Frenemy](https://image.tmdb.org/t/p/w300/tjJT4xkJW9yfVqQVZStE8qj88ze.jpg)
![Restraint](https://image.tmdb.org/t/p/w300/iN9862TjxP7m1oED9KixZV6wN9y.jpg)
![Raving](https://image.tmdb.org/t/p/w300/l0vU8CTH7TraYhrf3T21div9z5B.jpg)
![Party Guessed](https://image.tmdb.org/t/p/w300/sTolkPk45BXuAgYXMRgUl7nLyGz.jpg)
![Fury](https://image.tmdb.org/t/p/w300/6jtTJELTR5OKIuiq0shM5fc0UM1.jpg)
![Battlefield](https://image.tmdb.org/t/p/w300/aLo4AbvNqjL86lJI5i7Tb2ADKDW.jpg)
![Master Plan](https://image.tmdb.org/t/p/w300/lfYTRui5mGNyMndJTqKpPvI5XBu.jpg)
Derek becomes convinced that Lydia is the shapeshifter they're after, forcing Scott to gather his friends -- and even some enemies -- to protect her.